The Adapter,straight,tube to Boss, cataloged under National Stock Number 4730-01-270-9605, is classified within Federal Supply Class 4730 (Hose, Pipe, Tube, Lubrication, and Railing Fittings) of the Pipe, Tubing, Hose, and Fittings group. The manufacturer of record is Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok. Government technical data includes 23 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-270-9605 |
| Primary Part Number | 4BUAN4-A |
| Item Name | Adapter,straight,tube to Boss |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok |
| Status | ACTIVE |
| Furnished Items and Quantity | 2 FERRULE SLEEVE AND 2 UNION NUT AND 1 JAM NUT |
| Connection Style | FLARED W/ GASKET SEAL (BOSS) SECOND END |
| Connection Style | FLARELESS (TUBE) FIRST END |
| Nominal Overall Length | 2.151 INCHES IN |
| Connection Type | THREADED EXTERNAL TUBE FIRST END BULKHEAD |
| Connection Type | THREADED EXTERNAL TUBE FIRST END |
| Connection Type | THREADED EXTERNAL BOSS SECOND END |
| Nominal Outside Diameter Tube Accommodated | 0.250 INCHES FIRST END IN |
| Operating Pressure | 5.4 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Nominal Thread Size | 0.437 INCHES SECOND END IN |
| Nominal Thread Size | 0.438 INCHES CENTER BULKHEAD IN |
| Nominal Thread Size | 0.438 INCHES FIRST END IN |
| Seat Angle | 12.0 DEGREES FIRST END |
| Surface Treatment | ANODIZE NUT |
| Surface Treatment | ANODIZE BODY |
| Media for Which Designed | AIR SINGLE RESPONSE |
| Thread Class | 3A CENTER BULKHEAD A |
| Thread Class | 3A ALL ENDS A |
| Material | ALUMINUM ALLOY 2014 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) FIRST END |
| Thread Series Designator | UNABLE TO DECODE |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) CENTER BULKHEAD |
| Thread Series Designator | UNF SECOND END |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 4BUAN4-A PRIMARY | Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok (USA) |
| A400-61-4AN MOD PRIMARY | Swagelok Co (USA) |
| Reference | Meaning |
|---|---|
| 11455419 | 7/2 Vendor item drawing reference Us Army Aviation and Missile Command |
NSN 4730-01-270-9605 is a Adapter,straight,tube to Boss, manufactured by Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-270-9605 has 2 manufacturer part numbers on file: 4BUAN4-A (Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok), A400-61-4AN MOD (Swagelok Co).
Key specifications for 4BUAN4-A: Furnished Items and Quantity: 2 FERRULE SLEEVE AND 2 UNION NUT AND 1 JAM NUT; Connection Style: FLARED W/ GASKET SEAL (BOSS) SECOND END; Connection Style: FLARELESS (TUBE) FIRST END; Nominal Overall Length: 2.151 INCHES IN. 23 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.